Aug 11, 2010
Heavy rains during the second week of August resulted in the Iowa River at Marengo going above the moderate flood stage level of 15.5 feet on August 11th around 3 pm CDT. It crested around 15.8 feet around 7 pm CDT August 12. After falling below 15.5 feet for about 40 hours, it rose back above it and had a secondary crest around 16.4 feet around 1 am CDT August 18. It fell below the moderate flood stage level around 1150 pm CDT August 18.
Source: NOAA National Weather Service Storm Events Database (event 257286). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Iowa County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.